Oil burning lamp

ABSTRACT

An oil burning lamp comprises an oil container, a wick and a heating structure. The wick includes a first end located in the oil container to draw fragrance fuel oil therein, a second end to draw the fragrance fuel oil from the first end to be ignited for burning and a middle section interposed between the first end and second end. The heating structure is coupled on the wick and includes a heat transfer portion coupled annularly on the second end to get heat energy generated by burning of the fragrance fuel oil, a heating portion to clamp the middle section of the wick, a diffusing portion to bridge the heat transfer portion and heating portion and a diffusing chamber located in the diffusing portion.

FIELD OF THE INVENTION

The present invention relates to an oil burning lamp and particularly to an oil burning lamp to provide improved evaporation of fragrance fuel oil.

BACKGROUND OF THE INVENTION

Lamp sets capable of emanating fragrances have been made in a wide variety of styles. For instance, perfume candles available in the past commonly include a wick which can be ignited to produce flame to heat and melt solid candle into wax vapor to emanate fragrances. However, most essences contained in the wax cannot exude fragrance as desired when burned. Only a small portion of the essences produce scanty fragrance when the wax near the flame has been heated and melted. Hence the effectiveness of the fragrance candles to emanate fragrance is limited.

A conventional liquid type fragrance candle, referring to FIG. 1, includes a container 8 which has an opening coupled with a metal heating head 6. The metal heating head 6 has a hole 61 run through by a wick 7. The wick 7 can be burned to heat the metal heating head 6 to emanate fragrance. The metal heating head 6 directly receives heat and can reach above Celsius 100.degree. and results in overheat of the wick and scorching of the fuel oil to generate charred smell. Moreover, the fuel oil is directly burned via the flame and cannot effectively produce fragrances.

To remedy the aforesaid drawbacks, U.S. Pat. No. 6,960,320 discloses an oil burning lamp that includes a burner tube to hold a wick. The burner has one end threaded through by the wick outwards for burning that generates heat transferred downwards to increase heating area of the wick. The burning tube further has a plurality of brackets with gaps formed thereon to expose the wick to the indoor ambience, thereby can diffuse fragrance outwards. However, the burner tube is directly in contact with the wick, and the high temperature of the burner tube easily excessively burns the essence in the wick to produce charred smell. Moreover, the burner tube only has a few slots to expose and communicate the wick with outer space. It is not an effective fragrance emanation technique.

SUMMARY OF THE INVENTION

The primary object of the present invention is to solve the disadvantages of the conventional techniques of heat transfer structure that cannot effectively emanate fragrance in the air.

To achieve the foregoing object the invention provides an oil burning lamp that comprises an oil container, a wick and a heating structure. The oil container includes an oil storage room to store fragrance fuel oil and an opening leading to the oil storage room. The wick runs through the opening and includes a first end extended into the oil storage room to dip into the fragrance fuel oil and a second end to draw the fragrance fuel oil to be ignited by users, and a middle section between the first end and second end to allow the fragrance fuel oil to pass through. The heating structure is coupled on the wick and includes a heat transfer portion coupled annularly on the second end to get heat energy generated by burning of the fragrance fuel oil, a heating portion clamped the middle portion, a diffusing portion bridging the heat transfer portion and heating portion to transfer heat from the heating transfer portion to the heating portion, and a diffusing chamber located between the diffusing portion and the wick. The diffusing portion includes at least one aperture communicating with the diffusing chamber. The heating portion gets the heat energy from the heat transfer portion via the diffusing portion and heats directly the fragrance fuel oil in the middle section to evaporate the fragrance fuel oil in the diffusing chamber, then the air phase fragrance fuel oil in the diffusing chamber emanates to the exterior via the aperture.

In one aspect the invention further includes a first cap and a second cap stacked coaxially onto the first cap. The first cap and second cap have respectively a first track and a second track on the lateral sides that mate and couple with each other so that the first cap can be turned coaxially against the second cap.

In another aspect the first cap and second cap have respectively a plurality of first air vents and second air vents corresponding to each other.

In yet another aspect the first cap and second cap have respectively a first hole and a second hole overlapped with each other and run through by the second end.

In yet another aspect the heating portion is coupled on the opening and includes a hole run through by the wick and clamped the wick.

In yet another aspect the heat transfer portion and diffusing portion have respectively a first fastening portion and a second fastening portion for fastening together.

In yet another aspect the heating portion and diffusing portion have respectively a first coupling portion and a second coupling portion for coupling together.

In yet another aspect the heat transfer portion includes a support tube to support the second end of the wick.

In yet another aspect the heat transfer portion includes a coupling tube connecting to the second end of the wick.

In yet another aspect the heating coil is connected to the heating portion.

In yet another aspect the heating coil is connected to the heat transfer portion.

In yet another aspect the invention further includes a protective cap to encase the heating structure.

Compared with the conventional oil burning lamps the oil burning lamp of the invention generates heat by burning the first end, and the heat is transferred via the heat transfer portion and diffusing portion to the heating portion which heats the middle section to a higher temperature to facilitate vaporizing of the fragrance fuel oil, and the temperature of the vapor in the diffusing chamber rises via the diffusing portion so that the vapor is expanded and emanates outwards. Therefore the fragrance of the fragrance fuel oil can be quickly and more effectively evaporated and diffused outwards through the aperture. Moreover, during heat transfer process heat generated by burning of the fragrance fuel oil can be fully utilized.

The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a conventional oil burning lamp.

FIG. 2 is an exploded view of a first embodiment of the oil burning lamp of the invention.

FIG. 3 is a schematic view of the first embodiment of the invention showing oil diffusing condition.

FIG. 4 is an exploded view of a second embodiment of the oil burning lamp of the invention.

FIG. 5 is a schematic view of the second embodiment of the invention showing oil diffusing condition.

FIG. 6 is an exploded view of a third embodiment of the oil burning lamp of the invention.

FIG. 7 is a schematic view of the third embodiment of the invention showing oil diffusing condition.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please referring to FIGS. 2 and 3, the present invention aims to provide an oil burning lamp to fill an indoor space with aromatic smell of fragrance fuel oil. The oil burning lamp mainly comprises an oil container 1, a wick 2 inserted into the oil container 1 and a heating structure 3 coupled on the wick 2. The invention includes more features as follow:

The oil container 1 includes an oil storage room 11 to hold fragrance fuel oil 12 and an opening 13 leading to the oil storage room 11.

The wick 2 includes a first end 21 extended into the oil storage room 11 to dip into the fragrance fuel oil 12 and a second end 22 to draw the fragrance fuel oil 12 via capillary from the first end 21 to be ignited by users to produce flame, and a middle section 23 between the first end 21 and second end 22 to channel and diffuse the fragrance fuel oil 12.

The heating structure 3 includes a heat transfer portion 31 located annularly on the second end 22 to receive heat energy generated by burning of the fragrance fuel oil 12, a diffusing portion 32 located annularly on the middle section 23 and connected to the heat transfer portion 31, a diffusing chamber 33 located between the diffusing portion 32 and the wick 2, and a heating portion 34 which is located in the opening 13 of the oil storage room 11 and heats the middle section 23. In this embodiment the diffusing portion 32 and heating portion 34 can be separated. The heating portion 34 and diffusing portion 32 have respectively a first coupling portion 342 and a second coupling portion 322 corresponding to each other to couple the heating portion 34 and diffusing portion 32 together, and also hold the diffusing portion 32. The diffusing portion 32 also has a plurality of apertures 323 on the circumferential wall to facilitate passing through of fragrances. The apertures 323 can be round holes, slots, square holes, star-shaped holes or the like. In this embodiment the round holes are adopted. The heat transfer portion 31 includes a coupling tube 314 to couple with the second end 22 of the wick 2.

On the other hand, in order to facilitate carrying by users, a sealing cap 5 is provided to couple on the heating structure 3 and fasten to the opening 13 to prevent the fragrance oil wax 12 from spilling out during carrying or transportation without creating safety concerns.

Please refer to FIGS. 4 and 5 for a second embodiment of the invention. It mainly includes an oil container 1, a wick 2 inserted into the oil container 1 and a heating structure 3 a coupled on the wick 2. The embodiment includes more features as follow:

The oil container 1 is coupled with a first cap 4 a by screwing and a second cap 4 b stacking coaxially onto the first cap 4 a, and a sealing cap 5 a located in the first cap 4 a to prevent fragrance oil wax from spilling out. The first cap 4 a has a first track 41 a corresponding to a second track 41 b formed on the second cap 4 b so that the second cap 4 b can be turned against the first cap 4 a. The first cap 4 a also has a plurality of first air vents 42 a, and the second cap 4 b has a plurality of second air vents 42 b mating the first air vents 42 a. The first cap 4 a further has a first hole 43 a, and the second cap 4 b has a second hole 43 b overlapped with the first hole 43 a to allow the second end 22 to pass through to avoid the flame above the second end 22 from burning the first cap 4 a and second cap 4 b.

In order to avoid children from eating by mistake, the first cap 4 a and second cap 4 b further have a safety design. On the upper end of the first track 41 a there are a plurality of first latch portions 45 a, and on the upper end of the second track 41 b there are a plurality of second latch portions 44 b mating the first latch portions 45 a. The first and second latch portions 45 a and 44 b must be wrenched by a strong force to staggered positions to turn the first cap 4 a, and the first cap 4 a further has an annular latch portion 46 on an outer rim of the opening thereof to butt a detent portion 47 formed on an inner rim of the second cap 4 b to confine turning of the second cap 4 b on the first cap 4 a.

In this embodiment the heat transfer portion 31 a and diffusing portion 32 a of the heating structure 3 a are integrally formed. The heat transfer portion 31 a also has a support tube 313 a without a notch formed thereon. Please refer to FIG. 5 for movement relationship between the first cap 4 a and second cap 4 b. Through the first track 41 a and second track 41 b that are engageable with each other the first cap 4 a can be turned against the second cap 4 b so that the first air vents 42 a and second air vents 42 b can be overlapped or separated by turning the second cap 4 b, thereby to adjust the, passing area of fragrance emanating outwards and fragrance concentration.

Please refer to FIGS. 6 and 7 for a third embodiment of the invention. It mainly includes an oil container 1, a wick 2 inserted into the oil container 1 and a heating structure 3 b coupled on the wick 2. This embodiment includes more features as follow:

The oil container 1 further has a holding base 14 on the opening 13 and a heating portion 34 b connected to the holding base 14. The opening 13 and holding base 14 have respectively a holding flange 131 and a corresponding holding groove 141. The heating portion 34 b and the holding base 14 also have respectively a jutting rim 343 b and a coupling opening 142 leaned by the jutting rim 343 b so that the heating portion 34 b is positioned on the opening 13. In addition, the heating portion 34 b has a hole 341 b run through by the wick 2 in a compact manner.

In order to facilitate channeling of the heat energy of the flame on the second end 22 via the heat transfer portion 31 b, the heat transfer portion 31 b further has a support tube 313 b connecting to the second end 22 of the wick 2. To prevent the second end 22 from dropping into the diffusing chamber 33 b, the support tube 313 b has a notch 311 b to allow the second end 22 to be bent and leaned thereon. Furthermore, to enhance heat transfer effect the diffusing chamber 33 b also contains a heating coil 33 lb run through by the middle section 23. The heating coil 331 b can absorb the heat of the heat transfer portion 31 b and heating portion 34 b, and transfer the heat to the middle section 23 to accelerate vaporizing of the fragrance fuel oil 12 on the middle section 23.

In order to prevent users from inadvertently touching and burned injury, a protective cap 4 is provided to encase the second end 22. In this embodiment the protective cap 4 is formed in a mushroom shape with a plurality of air vents 41 formed on the circumferential and upper end surfaces, and a fastening portion 42 at one end to couple on the opening 13 of the fragrance burning oil lamp to butt the periphery of the holding base 14. The protective cap 4 has a hole 43 on the upper end run through by the second end 22 to avoid the protective cap 4 from being burned by the flame on the second end 22.

In this embodiment the heat transfer portion 31 b and diffusing portion diffusing portion 32 b also can be separated, and include respectively a first fastening portion 312 b and a second fastening portion 321 b mating each other so that the heat transfer portion 31 b can be screwed on the diffusing portion 32 b.

Furthermore, the diffusing portion 32 b and heating portion 34 b may also have respectively a second coupling portion 322 b and a first coupling portion 342 b mating and screwing with each other.

Please refer to FIGS. 3, 5 and 7 for the principle heating and diffusing the fragrance fuel oil 12 and heat transfer process of the heating structure 3. The fragrance fuel oil 12 is drawn upwards through the first end 21 of the wick 2 via siphonage principle to reach the second end 22 through the doused wick 2; then the second end 22 is ignited by a user to burn the fragrance fuel oil 12 to evaporate continuously and also continuously draw the fragrance fuel oil 12 upwards from the oil container 1. The burning second end 22 transfers the heat to the heat transfer portion 31, 31 a or 31 b, and through the diffusing portion 34, 34 a or 34 b, to heat the heating portion 34, 34 a or 34 b to a higher temperature; through the heat transfer portion 31, 31 a or 31 b and heating portion 34, 34 a or 34 b the heat is transferred to the middle section 23 from the upper side and lower side, therefore evaporation at the middle section 23 is faster, and through the diffusing chamber 33, 33 a or 33 b at the middle section 23 the fragrance fuel oil 12 is emanated outwards to fill the vapor of the fragrance fuel oil 12 quickly in the entire indoor space. In the event that a longer diffusing portion 33, 33 a or 33 b is provided the heating portion 34, 34 a or 34 b may be replaced by one of a greater contact area with the wick 2 to enhance heat transfer to the middle section 23.

Compared with the conventional techniques, the oil burning lamp of the invention can transfer heat steadily through the second end of the wick to the heat transfer portion and heating portion to heat the middle section held in the diffusing chamber. An upward and downward heat transfer process is formed so that the middle section can emanate fragrance more effectively without the risk of burning by the flame that might hamper emanation. The concern of generating charred smell caused by overheat of the tubular wall also can be averted. It provides significant improvements over the conventional oil burning lamps.

While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art.

Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention. 

What is claimed is:
 1. An oil burning lamp, comprising: an oil container including an oil storage room to hold fragrance fuel oil and an opening leading to the oil storage room; a wick running through the opening and containing a first end extended into the oil storage room to dip into the fragrance fuel oil, a second end to draw the fragrance fuel oil from the first end and be ignited for burning and a middle section located between the first end and the second end to allow the fragrance fuel oil to pass through; and a heating structure coupled on the wick and including a heat transfer portion coupled annularly on the second end to get heat energy generated by burning of the fragrance fuel oil, a heating portion clamping the middle section, a diffusing portion bridging the heat transfer portion and the heating portion to transfer the heat energy from the heat transfer portion to the heating portion and a diffusing chamber located between the diffusing portion and the wick, the diffusing portion including at least one aperture leading to the diffusing chamber, the heating portion receiving the heat energy from the heat transfer portion via the diffusing portion to heat the middle section to facilitate evaporation of the fragrance fuel oil into the diffusing chamber so that vaporized fragrance fuel oil emanates to the exterior via the aperture.
 2. The oil burning lamp of claim 1 further including a first cap fastened to the opening and a second cap stacked coaxially onto the first cap, the first cap and the second cap including respectively a first track and a second track on a lateral side corresponding to and engageable with each other to allow the first cap to turn coaxially against the second cap.
 3. The oil burning lamp of claim 2, wherein the first cap and the second cap include respectively a plurality of first air vents and a plurality of second air vents corresponding to each other.
 4. The oil burning lamp of claim 2, wherein the first cap and the second cap include respectively a first hole and a second hole that are overlapped and run through by the second end of the wick.
 5. The oil burning lamp of claim 1, wherein the heating portion is coupled on the opening and includes a hole run through by the wick to form clamping thereof.
 6. The oil burning lamp of claim 1, wherein the heat transfer portion and the diffusing portion include respectively a first fastening portion and a second fastening portion that are engageable with each other.
 7. The oil burning lamp of claim 1, wherein the heating portion and the diffusing portion include respectively a first coupling portion and a second coupling portion to couple with each other.
 8. The oil burning lamp of claim 1, wherein the heat transfer portion includes a support tube to hold the second end of the wick.
 9. The oil burning lamp of claim 1, wherein the heat transfer portion includes a coupling tube to couple with the second end of the wick.
 10. The oil burning lamp of claim 1, wherein the heating structure includes a heating coil in the diffusing chamber run through by the middle section of the wick.
 11. The oil burning lamp of claim 10, wherein the heating coil is connected to the heating portion.
 12. The oil burning lamp of claim 10, wherein the heating coil is connected to the heat transfer portion.
 13. The oil burning lamp of claim 1 further including a protective cap to encase the heating structure. 